Missoula, MT operator uses a scare tactic to upsale clients, stating that the manufacture requires systhetic oil or it will invalidate your manufactures warranty. They make you sign a statement that holds them harmless for choosing convential oil. The systhetic oil change is $75.00. They told me that the manufacture states that I much use a systhetic oil on their commputer recommendation and on my vehicles oil cap. However, when I insisted they showed me the language it said the the manufacture recommends a snythetic oil or equivelent and the oil camp oil list a broad range of oil weight. I brought in a quart of Lucas Oil to add and they still charged me as if I had used the full five quart oil change amount. My basic oil change was $45.00. A total ripoff, using scare and fraudulent business practices.